Issue 3, 2024

High-performance and self-powered visible light photodetector using multiple coupled synergetic effects

Abstract

In this work, we demonstrate, for the first time, that coupling together the pyroelectric effect, the photovoltaic effect and the plasmonic effect is a novel method to significantly enhance the performance of self-powered photodetectors in the visible region. Photodetectors based on tri-layered heterojunction of n-Si/p-SnO/n-ZnO through the inclusion of silver (Ag) nanoparticles (NPs) at the SnO/ZnO interface were fabricated. The photo-response of the device, with excitation from a chopped 650 nm wavelength laser, was carefully investigated, and it was shown that the photodetector performance is enhanced the most with the inclusion of spheroidal Ag NPs with ∼70 nm diameter. The Al/Si/SnO/Ag NPs/ZnO/ITO device exhibited an optimum responsivity, detectivity and sensitivity of 210.2 mA W−1, 5.47 × 109 Jones and 15.0 × 104, respectively, together with a rise and fall time of 2.3 and 51.3 μs, respectively, at a laser power density of 317 mW cm−2 and at a chopper frequency of 10 Hz. The present photodetectors are more than twice as responsive as the current best-performing ZnO-based pyro-phototronic photodetectors and they also exhibit other competitive features, such as detectivity, and fall and rise times. Therefore, by exploiting the plasmonic effect of the Ag NPs together with the pyroelectric effect in a ZnO film, and the photovoltaic effect at a Si/SnO junction, all in a single device, photodetectors were developed with state-of-the-art performance for the visible region.

Graphical abstract: High-performance and self-powered visible light photodetector using multiple coupled synergetic effects

Supplementary files

Article information

Article type
Communication
Submitted
18 okt. 2023
Accepted
22 nóv. 2023
First published
22 nóv. 2023
This article is Open Access
Creative Commons BY license

Mater. Horiz., 2024,11, 803-812

High-performance and self-powered visible light photodetector using multiple coupled synergetic effects

J. P. B. Silva, E. M. F. Vieira, K. Gwozdz, N. E. Silva, A. Kaim, M. C. Istrate, C. Ghica, J. H. Correia, M. Pereira, L. Marques, J. L. MacManus-Driscoll, R. L. Z. Hoye and M. J. M. Gomes, Mater. Horiz., 2024, 11, 803 DOI: 10.1039/D3MH01725G

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